A Lunar Trio:Catharina, Cyrillus and Theophilus

Sketching: For this sketch I used: black Strathmore 400 Artagain paper, white and black Conte’ pastel pencils, Conte’ crayons and a blending stump. After scanning, Brightness was slightly decreased (-2) and contrast increased (+4) using Microsoft Office Picture Manager. Telescope: 10 inch f/ 5.7 Dobsonian and 9 mm eyepiece 161x Date: 6-23-2008, 7:30-8:50 UT Temperature: 15° C (59° F) Clear, transparent, calm Seeing: Antoniadi II Colongitude 147.9 ° Lunation 19.5days Illumination 81 % Frank McCabe